The United States warned of "a potential threat" to commercial flights between Juba, South Sudan, and the Ugandan capital of Kampala.
The U.S. embassy in Khartoum said in a warden's message published Friday on its website that it "has received information indicating a desire by regional extremists to conduct a deadly attack onboard Air Uganda aircraft on this route."
The mission said although the capacity of the attackers to conduct an attack is unknown, the threat is "of sufficient seriousness," advising
passengers on any airliner and route to maintain vigilance at all times. The statement did not name a particular group to be behind the potential threat.
The United States also continued to warn its citizens against travel to Sudan, and particular its western region of Darfur, citing continued
violence involving government forces, rebel factions and several armed militias.
The warning came few weeks after a Christmas Day bombing attempt on a Detroit-bound U.S. plane was foiled with al-Qaida in the Arabian Peninsula
claiming responsibility.
Umar Abdulmuttallab, a 23-year-old Nigerian, told FBI he was in Yemen six months before the attempt to blow up the flight to Detroit.